Binary Lock Circle black outline icon
Padlock with keyhole beside rows of binary digits inside a circle outline
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About the Binary Lock Circle black outline icon
A closed padlock with a rounded shackle and a keyhole sits beside three rows of binary digits (01011, 110, 01, 11) cascading down the left, all held inside a thin circular frame. Together they read as encrypted data, cryptography and protected credentials. Use it on cybersecurity landing pages, VPN and password manager apps, developer documentation about hashing, data privacy settings screens, and IT security slide decks.
The padlock body is a wide rounded rectangle balanced against the staggered number rows, so the composition fills the circle evenly without crowding. It pairs naturally with shield, key, fingerprint and firewall icons in the same circular outline family. At small sizes the digits blur together, so keep it at 48 px or larger where the binary detail carries the meaning.
This is the black outline version of the binary lock circle icon: even, monoline strokes that stay crisp at small sizes and suit clean, minimal interfaces, wireframes and light backgrounds.
It downloads free as an SVG vector or transparent PNG in seven sizes, and the free online editor lets you recolor it, apply gold, silver, neon and gradient styles, add animation, or convert it to EPS, PDF and DXF.
Free for personal and commercial use with attribution.
